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| EPoS Contribution |
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The Problem of Dense Gas Tracers in Perseus:
Relating the N2H+, NH3, and Dust Continuum Properties of Pre- and Proto-Stellar Cores
Doug Johnstone NRC Canada/Herzberg Institute for Astrophysics, Victoria, Canada | |
| We investigate 35 pre-stellar cores and 36 proto-stellar cores in the Perseus molecular cloud. We find a very tight correlation between the physical parameters describing the N2H+ and the NH3 gas, indicating that they are probing similar locations within the cores. We also find a tight correlation in the inferred abundance ratio of N2H+ and para-NH3 accross all cores, suggesting common formation and destruction mechanisms. However, only the pre-stellar cores show a mild correlation between the dust continuum derived H2 column density and either nitrogen-bearing species. This lack of correspondence with H2 is disconcerting and presently unexplained. | |
| Collaborators: Erik Rosolowsky, UBC, Canada Mario Tafalla, OAN, Spain Helen Kirk, Harvard, USA |
Key publication
Suggested Session: Chemistry, Cores and Collapse |